If T were to scatters the leaves faster than H rakes them, H would Neve finish raking. So must be over 20 minutes
1/15-1/T=1/20
4/60-1/T=3/60
T=60 mins
So it would take Trudy 60 minutes to scatter all of the leaves
Answer: y=10
Step-by-step explanation:
I think I am sorry if wrong. :(
That's easy
alrighty
we can see that each of those curves from K to N and from N to L are just 1/4 of the circumference of the circle
the circles have centers at J and M
so
we have 2 of those 1/4 circumfernce so a total of 2/4 or 1/2 circumference
circumference=2 times pi times radius
radius=JK=JN=NM=ML=7
we want half so
perimiter=1/2 times 2 times pi times 7
we are given pi=22/7 so
perimiter=1/2 times 2 times 22/7 times 7
perimiter=2/2 times 22
permiter=22cm
the perimiter is 22
wait, I forgot abou the bottom part (KL)
that's just twice the radius or 2*7=14
22+14=36
the perimiter is 36cm
